"The enactment of tax reform in the fourth quarter is a significant positive outcome for the country. U.S. companies will be more competitive globally, which will ultimately benefit all Americans," Dimon said in the release. "The cumulative effect of retained and reinvested capital in the U.S. will help grow the economy, ultimately growing jobs and wages."

Dimon said on a call with the media that the company will be announcing something for the bank's employees "in the coming weeks" related to the tax bill.

It was a difficult trading environment for the bank. J.P. Morgan said its fixed income markets revenue declined 34 percent year over year driven by "continued low volatility" and "tighter credit spreads." The company's equity markets revenue was flat versus the previous year.

The company returned $6.7 billion in capital to shareholders during the fourth-quarter with $4.7 billion in net stock buybacks.

Its shares rallied through year-end after the bank reported better-than-expected third-quarter results in October.

Analysts expect the financial sector to benefit from the Republican tax overhaul, which President Donald Trump signed into law last month. The plan lowered the corporate tax rate to 21 percent from 35 percent.